RF field strength meter version 1.
I made a RF simple field strength meter for test the remote control from doors ,alarm e.t.c at frequency VHF-UHF,
i used one μΑ meter ,2 diodes ,2 ceramic capacitors,a potentiometer,a box ,and one telescopic antenna.When press
the button at remote control,output there is small current RF,where with this simple circuit ,easy i can to know
if remote controls it work or no.
| Here it is the electronic design | Here it is the electronic material,without yet the potentiometer 47 Kohm, 2 capacitor 18 pF,2 diodes BAT 41,and a μA meter | Here it is the plastic box,i have open holes for μA meter ,and i have touch the telescopic antenna | ||
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| Here with soldering iron the components it is ready | Here it is the sensitivity test | |||
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| Here it the test with remote temperature /humidity sensor | It is ready | Ready with full open telescopic antenna | ||
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| Click over to photo for to see a video about it | ||||
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RF field strength meter version 2.
I made a second version.The electronic design i saw from Here.
| Here it is a electronic design.I left the old potentiometer 47 kohm and the μΑ meter 100 μΑ. | Here i added this electronic material.One transistor JFET 2N3819,one diode germanium AA119,one cap 100 pF,one resistor 3,3 Mohm,one clip 9 volt battery,one battery 9 volt,one switch on-off,and one inductor over ferrite 1,82 μΗ. | I use a coil over to ferrite about 1,82 μΗ (i removed little coil for it is about 1,82 μΗ) | ||
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| Here i added a switch on-off,and i put the aerial antenna to other side. | From the other side. | I finnish with the soldering iron material. | ||
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| RF field strength meter,It is ready | Here i make a test with out remote sensor from weather station at frequency 433 Mhz. | Here i make a test with remote control 433 Mhz | ||
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| Here i make a test with mobile phone 1,8 Ghz. | Click here for you see a video | |||
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